Hy-Gain VB-214FM tuning for 144.200

Discussion in 'VHF/UHF - 50Mhz and Beyond' started by K5TRI, Aug 31, 2017.

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  1. KK4YWN

    KK4YWN Ham Member QRZ Page

    wait.. are you operating FM on the low part of the band or no?
  2. K5TRI

    K5TRI XML Subscriber QRZ Page

    Where is this FM in the low part of the band nonsense coming from? Why would I want to do that?

    KC3BZJ likes this.
  3. KK4YWN

    KK4YWN Ham Member QRZ Page

    right. so when someone asks a direct question the correct response is a meme and an indirect answer.

    way to communicate
  4. K5TRI

    K5TRI XML Subscriber QRZ Page

    Pretty much given the previous posts. So let me ask again, why is there any assumption I would want to operate FM on 144.200?
  5. K5TRI

    K5TRI XML Subscriber QRZ Page

    As a follow up (mostly for it to be documented if somebody does a similar search) I can report that the antenna performed well in the VHF contest, as well as in my
    first successful MS contact with another station in Nevada running only a 6 element yagi (a 881 miles contact).

    Thanks again for the helpful input and good ideas.

    73 Mike
  6. W0AAT

    W0AAT XML Subscriber QRZ Page

    When someone specifies 144.200 the 2 meter SSB calling frequency I pretty much assume they are operating weak signal!
    K5TRI likes this.
  7. W2WDX

    W2WDX Premium Subscriber QRZ Page

    Made perfect sense to me. Since Hy-Gain doesn't make a VB series with a hairpin match for 144.200 and only vert. pol. tuned for the FM segment, I assumed he wanted a hairpin match yagi and use it for SSB weak signal. I can face palm as well.

    Although for me I found the LFA series much quieter than my re-tuned VB and real easy to tune. And it's already optimized for horizontal & the weak signal SSB portion of the band.
  8. K5TRI

    K5TRI XML Subscriber QRZ Page

    It was an experiment given the price of the antenna ($89) it was worth the risk. They claim coverage of 144-148 so I figured I'd give it a go. It's working now.

    I agree on the LFA and the lesson leaned here is that when in doubt, build it yourself. So back to the DK7ZB designs for a different project.

    Tuning, with my modification of the driven element is now easy. Eventually I will try the original hairpin match to see if I can make it work. I was in a bit of a time crunch to get it up for the contest.
  9. W2WDX

    W2WDX Premium Subscriber QRZ Page

    Did you also adjust the other elements? And if not I wonder how this effects pattern and gain. Having a good match is one thing, maintaining pattern and overall ERP is another; possibly even more important in weak signal work.

    If you know the measurements, it might be a good idea to try and model what you have right now, just to get a clearer picture.
  10. K5TRI

    K5TRI XML Subscriber QRZ Page

    Nope I didn't as there's really no documentation out there and as I mentioned, time was of the essence :).

    Just copied KD7HB down in Oregon on 2m FT-8. That's a 225 mile distance, so not too shabby I'd say given that we have these pesky mountains in the way.

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